Matched Pair General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods Top Filament NOS NIB Records HS 11147 These five GE 6F5s were

These five GE 6F5s were tested on our Paul Hart-calibrated TV7/U for shorts

Sylvania-LABELED 11BM8 tested to spec on our Paul Hart-calibrated TV7/U

new in box RCA 13GF7 13GF7A tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 2000/1900 micromhos for Tube One and 2000/2000 micromhos for Tube Two

Matched Pair General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods Top Filament NOS NIB Records HS 11147 These five GE 6F5s wereThis new old stock, new in box matched pair of GE MANUFACTURED 6SN7GTB dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and transconductance measured as follows: Tube One: 79 72 (GE MANUFACTURED, Amperex LABELED) Tube Two: 82 76 Bogey: Minimum (65%) is 50 50; 100% is 77 77 Physical Characteristics: Bases: tall Bottles: medium height Date Codes: none and MY, respectively EIA